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Finding the Fourth Proportional to 626.77, 938.19 and 430.63

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Solution

The fourth proportional to 626.77, 938.19 and 430.63 is: 644.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.77 : 938.19 = 430.63 : x
  2. Step 2: Convert to fraction form
    626.77/938.19 = 430.63/x
  3. Step 3: Cross multiply
    626.77x = 938.19 × 430.63
  4. Step 4: Simplify right side
    626.77x = 404,008.07
  5. Step 5: Solve for x
    x = 404,008.07/626.77
  6. Step 6: Final answer
    x = 644.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.